Street-sweeper



W. S. GUYON.

STREET SWEEPER.

APPLICATION FILED MAR. I. 1917.

I z I l o w 1 M M 5 w N% A mm N QwQ m wmww m5 .J n bl d w lo 6 4 RM t k H I m I P mm M w. s. GUYONI smm SWEEPER.

APPLICATION FILED MAR. 71 I917- 1,383,625. Patented July 5, 1921.

4 $HEETS-SHEET 3 67 l 6 I \S liq: I V

I rllllI-Ilrllllllll'lllll gvewtod W. S. GUYON.

STREET SWEEPER.

APPLICATION FILED MAR. 7. 1911.

Patented July 5, 1921.

4 SHEETS-$HEET 4 lessee,

3 niotoig 'ilwhfi chengine Will not only propel eifstl' eners ilsd c v e obj 'ect of my 'irn'proVed motor sweeper s. $6 .plrs e T H eS Q and C p e street '1 swee ing machine 'ttfhich is economi- Cill 1" dt iiimtn; h' ngmii d fit ii j t ei s t adapt the 'niicliine'for differenf'situations and only as many parts as are nec es s'zi'ry'to; produce the proper result; the mach i neffbeing automatic throughout and perfo'rniing 2'; large variety of operations in pielring iqi'peper and refuse, sweeping dust,

reinqvingthe sweepings, and then disposing of the j'collections in one continuous round Qf glfthiiizttltj meohamcal operations so that ti 1 get, r'oa d' or. surface gleaned is left inen edproved end setis'factory condition;

fid tlie' inien i i a th r e mey' e d to consistessentially in 'the .c'on'ibination, arrgin e ent,fencl'bonstrnction"of the Various I ,i'n'ic ztl. parts to ,tlie'end. that the operamay besmooth and perfect substane sf wijllQbe hereinafter cl'escribed and more perticiilarly pointed out in the i' -"iv y I fln'j the ztcgompzinying clra'win'gs illustratingfr'nyint'ention:

Figures is a side elevation of my .im

proved street sweeper E 2 2. sca' top. plans i o the vin connections: and shows some of the other Diet e sectional elevetionel View of certziin details; 3

'ldig, l 's' gin enlarged deteil side elevation .ofthe main portion of the machine showing-theswe'fepingdevices and the dust 'col- 4 lecting receptacles contiguous thereto, together ith the means for operating them;

STREET-SWEEiER.

Specification-of I aetters Patent. x PatQntGd s ic tioi file d'liarcl '7, 19-17, Seii'a'lNo. "152,995.-

- T WLALTER s. GUYONZ, or lnooxiaxir, Newton; g

(hi-m5, .1921.

Fig. 5 is an enia'rgedfletah side viev'vof the operating mechanism for the brushes'; igf6 emer ed cross-sectional 'elef when of the b'rgs'h' and the means {for act netihg ehdhdjiisting theseine"; 3 is e 'topfplztn View ofthe -mechan ism's howninl igqoy 1 i in-g: 8; a vertical sectional view of the elevating mechanism at the fiont oafthe machine for liftingfthjecolle'c tiohs 1 nd dii'inpingthernfinto areoeiving"paii ig. 9 is "a', defiail' s'ectional side a portionof the brush'snpport; Fig. 10 ise; d'et'ziil View in plan showing the mechanism through which the I bubket ljllilll' lifts ancl dischar es "the" -lirt' into'fthe CQIIect-ifigbifi 'of'th-e match-indie meme-an;

View of to'it s' lbiirerrhost,collecting, positibn;

"Sinfiilei" character's e refer rijee designate corresponding parts throiiglioiltthe different figii'ijesofft-he drawin 3 l o r The, general, frat-me of the machine can sist's'""of 'a suitable horizbntaliectangfilar skeleton struhtlii'e eilapt'e'd lt o eceeminodste therein and therewith var ioiis' hiechzinical feetnres, said frame being" prefereblj' es'to one. portionthereoflsey the Tee-r htlf; as 1', somewhat, higher", than the other "half or front p'ortion, es '2, since such a shape lends itself rnore ez isily to thefiinctionbf properly snpport'ing' the'i aiioiis relatedf parts; said'reer higher portion 1 carrying thereon a'fi o'tor3,'whicl majjbe 'a'gesolene or other engine .errange'cl to actuate A longitudinal shaft 4 above the frame 1, and having thereon ehclntdh device lp'operated by a handle 11 and i'clutch device "12 operated by a handle 13,'j which .cliit ches serve to throw the sheftinto endout of action" in various Ways tob'e hereinafter explained. The clutch 10 is connected to a bevel gezi'r Wheel 1 1 which meshes with :a bevel gear Wheel 15, While the cluteh 12 operates a betel gear wheel 16 that meshes with 2t bevel gear wheel 17 on a vertical shaft 18, these gear ,wheels 15 and 17 ha vingthe fiinction of driving certain of the palrts as I shall hereinzifter more fully set forth.v v

The frq r'1t portion 2 of the frame-carries a' large hopper or receptacle 6 having a cover T provided With a handle 9, 'stitl l'cover being pivot'ally huiig at 100,0n the elevator easing 8 or elseiiirhere. The receptetele 6 is movebly rnountekl on platform 2 by links 101, and said receptacle lS d'GSlgI I'BCl to receive and; sweeping r v eing alongcollections from the streetf there b side of the hopper 6 in the rear thereof;

' semis-tie:-

will be understood ante the niaiif frani'e' I 3 and 2 is provided with front wheelse and rear wheels (4, of which obviously there m r-b a y ides redi-eembe w er xamp o tz onit a near, as illn t-reterhet ny herin mbenif pr pe ly SRPPDE iQ t ram he m ha i al ners a d t bu den some f th er W ls, s; ice; ex mp e, th front; wheels 1 a are directly driven by; ;connection with the motor f3-1in, order\ t ;f;u1f; nish propelling powerg for} the street sweeps: m ch a o ge surface-9t he s e or road; on whichit is operated; .i

The bevel gear wheeltlet whip s a lji a hewa d en 9 he rem section 1 and contiguous-to the elevator ease ing 8,,is mounted on i heguppen end of a vert e i tt 0 e Fist 2?; wh h: c rri s a ev e r wheel et-(" ee gts l w end, which meshes with bevel gear wheels :22 adapted togber clutohed byfihe clutches 23 and 24 to one; orfthex-other-ofathe horizpntal transverse shaft sections 251 (see Fig. 2) on the opposite ends of which Tapes-sprocket wheels26 and 27 From the sprocket wheels 26 nd2 i n ha ns-289mm t-, id -9 h mach ne wh h: s h me 29355 ta n sprocket. wheels 29 on the shaft 30 tha t car ries. the frontidriven wheels; up: a ln gthis wayv it will be seen that powerns. vco nrnurrh, cated from the motor 3 to the front whefelso for the purpose'of actuating. the latten and propelling the machineomthe road. "The machine is driven in. one ,direction. by nsing the cl utohi23" and :in the opposite c rection h v ;us1ng the clutch =2,-:t. v In the arrangenrent of gearingvshown in the drawlngs the 1 machine is ,driven in va. forwarthdirection.

when the clutchv isioperated ,to tconnect its .3 sha ft section 25; with the n otorrdriven gearing. This driven in pnlseds, cozninn ni; cute-d either on onejor bothsidcs.of the ms, chine, usuallyonlyon one side atyone time; the connections being controlled as aforesaid; by the clutch devices 23, and24, :(and also the clutch devices 31) whereby theshaft sections are thrown into and out of action, so that thelatter may be idle or; eiiectire, and in this connection itrmay be. ob-

served that obviously all these clutch devices 23, 24 and 31 will be equipped witlrproper.

operating levers so that the-attendantmay control the movement ofvthe different parts of the mechanism.. The means for controlling these clutches, as alsothe levers-11 and 13 which control the clutches lOand 12, will preferably be located in convenient: proX- iniity to vthe seat 5ofthe driver which is migrated i-su t frame section 1 as indicated in Fig. 1.

cigages"a sprocket wheel 33 on a shaft 34 Wh ch is mounted in standards below the fioiit port-ihn 2 of the main frame. 'On the -endspf this sha ft 34 are sprocket wheels 35 around which pass chains 36 that likewise pass around sprocket wheels. 3f? ona front heri e et e'ensrer e ha t 38.,that is 1 ported in brackets 39. ,carried: by the front tion .Z- of,the inaing fraine Below; the ten po t en 2 t the ma f me i a basket entending transversely across the frame atshort. tance above the, ,ground, and

contending; .for varclly from said basket is a eries tr gid fin rs atlw h p ei tid n toward the' ground and assist in picking .;up paper and yarious large obj ects, ,that is] to say, wli iclnassist in combing the surface of the stieetin advance of the sweeping brushes f 'o r the pnrpose lot I collecting such of the reinseeetet t a y ei r th stree that is possihle', tolgathe in this manner, and thusrelieve the brush from the work of handling the heavier articles. Operating with these rigid iingers are two or more rakes 42 consisting ,of cross-rods secured to carrie dby the chains 36, said'cross-rods havingaseries of teeththat are staggered 'l'" fingers 41, see Fig. 2, y

8 Whichis supported t n, of themain framejust I I, acle' 6;proteo t's, andincloses really;nub a ialecha-ins19 one at each ,then1acl i11e; 'sliown in the enlarged n n igfl and running around the lower .ll els iz pl tlll shrines carried it secured below the platform .Qalsopassing aroundupper sprocket wheeled?) carried on a horizontal lfi t hatfi inurnaled in the sides of the ({2tSl11g S ,fIhe, chains 19 are driven bythe sprocket wheels 4.5, n'hichare driven by outside-inrl inedchai ns7passin g around sprocket n 'heels -18 likewise on the shaft 46 and also around sprocl-ret wheels 26 on the lower shaft 25 E which is. directly driven by a gearin connection with the ina'in engine shaft ll: ns alreadyexplained. The chain or chains 19 carry a transverse bucket -or buckets 49 suitably pivoted thereto at 50 see Fig. 8, and as the chains 19 move upwardly theycarry with them the bucket 49 which is Caused to occupy diiferentpositions by virtue of a guiding track 51 against which it' slides. Said bucketis also provided at its rear side with a hook and it has an open mouth 53. lVhen the bucket is in its hottom position, itsmouth 53 isso situated-that itis open to rece iv e.,quantities of sweepings delivered thereinto a main shovel device 54 which I shall "presently explain} As bucket $9 10 2 anonnd which passes a chain 32 that too movement of the chain's'al9whichncanwbe accomplishedi by suitablelever and clutch :to the-top and the bucket 19 is lifted ,over

the shaft 46, saidshaft' will be engaged by i v the hook or hooks 52,*andithis will stop the further movement of the bucket 1 at the moment when its, mouth 53 is-directly over the receptacle :6 and the contents of the bucket 19 will consequently at this time be dumped into the receptaclet. ltwill be understood that this bucket is operated intermittently by leverage devices applied to the clutches 31 or any other instrumentality by means of which motion maybe temporarily communiv Gated fromthe shaft sections to the chain:

17: for the purpose of I driving the elevating chains 19 long enough to lift the'bucketrw from. its lowermost position, as sho-wnlin full lines at the bottom of Fig. 8,:to its upper most dumping position, as shown in dotted lines in the upperpa-rt of Fig. 8. A reverse mechanisms replaces "the empty bucket 9 at the bottom of its vertical travel in the position shown in Fig. 8v where it is irireadi: c

ness to be again filled with'the sweepings collected by the shovel, To" secure'this re-.

, verse movement "the mechanismWillustrated in Fig: 10 maybe employed. In thisview the shaft sectionf25 is the one employed for reverse driving of the machine. Thesprocket wheel 26, connected, by the "chain 28 with. tlic' fsha ft' of the drive wheels, loose upon the shaft-section 25, butj-is adapted m be connected therewith by a 1 clutch 26 Supposing now thatyithe machine nect the forwardly-driving shaft section 25 is" moving in a forward'direction and that the bucket 19 ha sjbeen filledand the opernot wishes to empty its contents into the l bin 6. He will, through the clutch 31, con

7 with the sprocket wheel 26 to eausethe'lifting-chains 19 to be driven and the bucket resented in dotted lines in Fig. :8. A I Y as it reaches this position the clutch 31' disengaged, T0 reverse the inovementoff the bucket, moving itbac'k to leading posi 49 ele'vated into dischargingposition as rep As soon tion; the other'clutch- 31, on the rearwardlv driving shaft'sectionQfi isoperated. 1 As it is "desirable that this reverse movement should take place-Without stopping the forward movement of the; machine. I interpose, between the shaft section 25 andthe sprocket wheel, 26,"which is loosely supported upon such shaft section, aclutch 25 which is only used when it is desired to drive the machine in a reverse'direction, and hence to connect the shaft 30 .011 which are supported the drive wheels with the power train through the reverse driving shaft "section 25 and 'clutch 2 1. Theclutches 31, 31 on the shaft sections 2 5 are preferably, friction clutches, and-I operate one, of them for the purpose of driving the chalns 47 1n one direction so as t'olift the bucket t9 to its uppermost dumping position, at whiclrtime the book 52 isini engagement with the shaft 16 rand then I operate the other clutch 31 which connects with the other'shaft section 25 that is revolving inthe opposite direction, and in this I way I'am abletodrive the chains 19 inthe reverse direction and bring the bucket 19 back downfro-m its top dumping position to its lower receiving position, as shown in full lines'in Fig.- 8. V a v a 5-l= designates a shovel which is of large and substantial. construction, and which extendstransversely across the machine, as

"shown in Fig. 7, a scoop shape and being designed todrag along on the ground just in the rear ofthe receiving elevator bucket. 49. Shovel 54 is'suitablycarried bv tached to the platformfl, which shaft 56 is provided atthe ends with crank arms; 58, see Fig. 4, to which arms'58 are attached chains 59 running aroundupulleys 60, and fastened towhooks61 that slide inguides 62.

Theseguides 62 have rigid pins 63 that; enter a" slot 64; in the hooks 61. The for a shaft- 56 journaled inthe bracket 57 at- I loo Ami-(lends of the hooks are designed to en gage pins with fwhiclra certain number of links (SGuare rovided, said links belon ing to "endless chains 69 that are operated for the purpose of actuating the brushes 55 carried inbrush heads 55, the details at said brushes: being indicated'in Fig; 9. It will be obvious that the brushes as they bruslralong on the surface of the street in the direction ,shown by the arrow in the bottom of Fig. 1 and while the machine is moving in a forward direction, will sweep the dirt intothe shovel 54: when the latter occupies its lower POSlli-ldll', as, indicated 111 dotted lines in said figure. At certain points inthe progress of the brushes the pins '65 with which certainof the links 66 are provided will be engagedbythe hooks 61, and the hooks will be carried along in the movement of the brushes, thus drawing on the chains'bf) and'turning the crank arms 58 and shaft56 thereby lifting the shovel:

54 by the rotation of shaft 56 and causing itto turnover and dump into the open mouth 53 of the bucket 49,1111 asindicated in Fig. 41. When the shovel or Scoop 5& has

been lifted to its dumping position, as. shown 1n fulllines lIl Flg. 4;, it is held there long enough to: discharge itscontents, and

&

their-the hooks 61'will come into contact with the projections 10 i on the mainframe, and the beveled faces of said hooks will slide on the'p' oiections 19 i, therebylifting the hooks sufliciently to clear. them 'fromthe pins 65, whereupon the weight of the shovel will cause it,to drop againinto its dragging position where it receives the 'collcctions of the brushes. i Y e The brush heads 55 are provided with pairs of antifriction. rollers 72," each of which has a short shaft 105,onesend'; of which shaft is journaled in the brush'head 55, as shown in Figs; G and 9,.whilethe other end is carried by a' link' 1'06 ofthe brush-carrying chains 69'," several links of said chains, say. four' of each, as shown in Figs. 4 and 5, being properly enlarged and perforated to permit the reception iof the ends of-the shaft 105 therein.) The rollers 72 operatebetween the sides 71 of the main frame and the channeled guides'70 which are secured to said sides 71 at a-short distance above and below the same by means of the outwardlyprojectingistraps 74 which are of proper size and shape to allow the chains 69 to operatefreely through them. The chains 69 are located, one at each side of the machine; andthey carry the shafts 105 and their rollers 72, as alsothe brushes 55 supported thereby, as I have explained;

. and thesechains 69 aredriven by? means of sprocket wheels/Z9 around which said chains 69 pass, as shown inFifg. 4. These sprocket wheels 79 are mounted on horizontal transverse shafts 73 that are supported in sockets 77 on the lower ends of verticallyadjustable rods '76,. which pass, upwardly through bearings 7 8 that are bolted or otherwise firmly attached to-the main frame section 1 (see Fig. 4); also to the ends of the shafts 73 outside of'ithe vertically-movable guiderods 7 6 are pivotally attached vertical links 96, whose upper ends are pivoted to horizontal levers 9 1, that are 'fnlcrumed on brackets 95 secured to the main frame 1 and projectingbelow the same, the inner opposite ends'of the horizontal levers '94; being pivoted to vertical links 93 whose upper ends are pivotally attached to a link block 92, which in turn is pivoted to a link 91 that is also pivotally attached to an arm 90 secured to a shaft 85, to which shaft is also attached a lever 84-. The shaft 85' is heldill bearings on the top of the frame 1, said, shaft 85 being" a horizontal shaft that passes across the machine. Hence; the connections 90, 91, 92, 93, 94-, and'96 'are duplicated on both sides of the machine, so that the whole mechanism may be operative by the lever 84, which is arranged contiguous to the drivers seat'5 for the purpose of enabling the brushes 55 to be raised andlowered-at' will and thus adjusted with relation, to the surface of the street andthus caused to bear thereon more heavily-or morelightly,- as may be required. The blocks 92 are. each provided with an upwardly extending rod 97 which slides through a bearing 86 onthe top of framed Also the shaft 85 is provided with a rigid arm'SS carrying a counterweight 89 to make theoperation of the lever'84 quicker and easier. It is further to 'tivelyarranged and; combined for joint operation, ibut susceptible of various- 'modifica tions: in 5 actual practice in order that the-best results: mayI-b'e secured. :It will" .also be noted. that the sidesi71'ofthe frame belonging to the mechanism for carryingland rais ing' andlowering the brush. are connected together by suitable cross braces, as for example,:, the-"braces T75 indicated in Fig. .7, though substitutesupports and braces may be employedif needed. F

From? the foregoingwdescription of the construction. and rrela'tivearrangement, of the I various parts, the operationwill be clearly understood. t willbe seen that my im-. proved fsweeper- "p'rovid'es a V mechanism whereby the surface of the-street may be eifectually cleaned by a dry fbrush and the sweepingsfquickly industrious'lyy'and automatically-takendirectly from the brush and conveyedby a series of appropriate mechan ic'al" operations performed. infa unitary apparatusto aribin or receptacle of considerable eapacity 'which only needsan occasional'emptying so that the apparatuslmay beoperated for allongtime before said' bin 7 requires toxbe discharged. By supporting.

the" mechanism and? driving 1 it also in the way I have-described',-a m'o'tor apparatus is providedwhichl can be. operated economicallyon-anykind o'fa surface which it is desired tofclean at any desired speedJand with an adjustment for'the-brushes which is easily variable to suit-varying conditions.

The operator has everything completely and immediately underhis control and at his hand from the use of the variousdevers arranged inclose proximity to the seat.

' When the-machine-isfirst set into operation, the necessary: clutches,- levers,- etc; are

utilized for that purposeg and ordinarily I find it-best to drive the machine forwardly though the use. of the gears; chains, and

other connections on one side of the machine, as for example, one of the shaft sections 25, the chain 28 and sprocket wheels 26 and 29; while on the other hand when it isdesired to reverse the machine I employ the driving connections on the other side, as for example, the shaftsection 25 and sprocket wheels 27, 29, and chain '28, in these instances the power being applied, as is easily seen to the front drivers at; a. While the machine is moving forward moreover, therigid'fingersil which constitute aprojectingicomb, are in position close to the surfaceof the street, and the rakes 42 are revolving rapidly and picking upall large articles on the street and transferring them into the cage 10, sothat in advance of themachine the street is effectively cleared of the largest part of the debris, leaving the brushes to applytheir rubbing eflect-to the streetsurface to take up the smaller par ticles of dirt, dust, etc. l/Vhen in the course of the progress of the machine the attendant observes that the shovel 5d has delivered intothe bucket 9,he will operate the proper clutch 31 and cause said bucket 49 to be lifted and discharged into the hopper 6, and when so discharged he will operate another proper .clutch and cause the bucket 4:9 to be carried down again to its bottom position at the lower end of the guide track or tracks 51, where it is in readiness to re" ceive the next automatic dumpingof the shovel. Theshovel is filled, of course, again and again by the brushes sweeping the refuse:

into it. Furthermore the operator by a manipulation of the handle 84 is able to raise and lower the frame which carriesthe brushes and cause them to be placed-nearer to or farther away from the surface that is being cleaned. This is a great advantage, and when taken in conjunction with the automatic shovel and the lifting bucket, a series of mechanical functionsis employed which, not only has unusual novelty, but makes it possible fora single machine to do an immense amount of work and to displace'a great deal of labor now employed by I hand.

It will be noted that I have represented many of the parts inoutline merely, especially where they consist of gears and trans mitting and connecting-means, since .it is possible to arrange these parts in a large variety of different ways, and I wish the entire liberty of applying and relating these parts in the best way to accomplish the end in view; and further it is insisted upon that in the actual development and practical operation of the machine I shall have the right to make all the changes needed to perform the best results and to carry my invention into effect in the most successful way, provided only I do not exceed the scope of the appended claims. Referring again to the guide rods.

brushesor sweepers 55 which are located transversely of the machine and are carried in brush heads 55*, it will be understood that the length of these brush heads and consequently theeffective sweeping area of the brushes may be of greater or less length, but usually I prefer to have these brushes extend clear across the niachineso' that the ends thereof, as indicated in the drawings, maybe directlyin line with the tracks made by the wheels a, a or a, at, either one or both sets, in order that the end of the brush mayoperate in the gutter close up against the'L-urb without leaving any unclean space at that point. This is an important feature in the construction and location of thebrush,

and I desire to lay stress thereon in the ,de-

porting thesaid chain, a; frame inwhich said wheels are mounted, said frame havingv channels in which the said antifrlction rollers operate, .means for driving the chain,

means for raising and lowering the said frame, and guiding means for said frame in its up and down movement, consisting of vertical rods working through sockets on the main frame. a

2. In a street sweeper, the combination of a main frame, a brush, an endless 'travelert o which it is attached, meansifor driving the traveler, means for raising and lowering the traveler, said latter means including an operating lever and a systemof levers operated by said operating lever, and vertical guides for the means which raises and lowers the traveler, consisting of vertically-movable rods and socketson the main frame which receive and guide said rods.

3. In a street sweeper,'the combination of a brush, a chain for driving it, a movable frame, wheels journaled in said frame for V supporting the chain, antifriction rollers in channels in said fra1ne,'which rollers are attached to the brush and to the chain,'outwardly projecting straps within which the chains operate. freely, said straps being atstitched to the movable-frame, means for raising andlowering said frame and contiguous parts, said means including a system of le r vers and anoperating hand lever, vertical guide rods for the said movable frame, a main frame, and sockets thereon for said 4. In a street sweeper, the combination of sweepers, an endless traveling chain carrying said sweepers, means for supporting and guiding said chain, leverage means for adjusting said supporting means so that the sweepers maybe brought into proper relation with the surface beingv swept, a movable shovel which receives the sweepings, and a detent for controlling the movements of the shovel to cause it to discharge the sweepings said hook and the shovel.

6. In a street sweeper, the combination of a brush, an endless chain carrying the brush and having projections thereon, a frame in which the chain is supported, means for raising and lowering the frame, a pivoted shovel which receives the sweepings from the brush, said shovel having a crank arm, a hook adapted to engage projections on thechain' and having an inclined releasing edge and a slotted body, a stationary pin which releases the hook from the pins on the chain when the inclined edge strikes said station ary in, a stationary bracket engaging the, slotted body of the hook, and a connection between said hook and the crank arm on the shovel. V

7. In a street sweeping apparatus, the combination of a main frame, brushes, endless chains carrying the same, sprocket wheels supporting said chains, a frame in which said sprocket wheels are ournaled, vertical rods having bearings/for the journals of the sprocket wheels and working up and down through sockets on the main frame, interpivoted leversv connected to thejournals of the sprocket wheels, means for. actuating said levers for the purpose of raising and lowering the frame, and vertical guides connected to said means and working through sockets on the main frame. 7 i

8. In a street sweeping apparatus, the combination of a main frame,,brushes, endless chains carrying the same, sprocket wheels supporting said chains, a verticallymovable frame in which said sprocket. wheels are journaled, upright guides having bearings that receive the journals of the sprocket wheels and which work up and down in the main frame, links pivoted to the journals of the sprocket wheels, levers pivoted to said links, fulcrums for said levers that project from the main frame, an operating lever and connections between the latter and the said levers by which they are jointly operated.

9. In a street sweeping apparatus, the combination of a main frame, brushes, endless chains carrying the same, wheels supporting said chains, a, frame in whichthe wheels are journaled, vertical rods for the latter frame, sockets on the main frame receiving said rods, levers connected to the journals of the sprocket wheels, means for actuating said levers for the purpose of raising and lowering the frame that carries the wheels, said means including an operating lever, anda counterbalance lever for assisting in; holding the brushes to the surface bemg swept.

10. In a street sweeping apparatus, the combination of a main frame, brushes, endless chains carrying the same, sprocket wheels supporting said chains, a frame in which the sprocket wheels are .journaled, guides for the up and down movement of said frame, links connected to the journals of thesprocket wheels, levers fulcrumed on the main frame and pivoted to the upper end of said links, links pivoted to the other ends of the levers, other links connecting the upper ends of said links, pins 011 said lasti mentioned links working through sockets on the mam. frame, and an operating lever for actuating the aforesaid systemlof levers.

11; In" a street sweeping apparatus, the combination of a main frame, brushes, endless chains carrying the same, sprockets wheels supporting said chains, a frame in which the sprocket wheels are journaled, vertical rods carrying bearings'for the journals of the sprocket wheels and sliding in guides on the main frame, links provided with upWardly-projecting pins that slide through sockets on the main frame, connections between said links and the journals of the sprocket wheels, .said connections consisting of links and levers, leverageimeans for raising and lowering the aforesaidsystem oflinksand levers, said mechanism including an operating lever.

and a counterbalance means for assisting in the movement. 1

In testimony'whereof I'h'ereunto my signature.

WALTER s. cUYoN. 

